Concordant Literal
11 For this is the message which you hear from the beginning,
12 that we may be loving one another, not according as Cain was of the wicked one and slays his brother. And on behalf of what does he slay him? Seeing that his acts were wicked, yet those of his brother, just.
13 Marvel not, brethren, if the world is hating you.
14 We are aware that we have proceeded out of death into life, for we are loving our brethren. He who is not loving is remaining in death.
15 Everyone who is hating his brother is a man-killer, and you are aware that no man-killer at all has life eonian remaining in him.
16 By this we know love, seeing that He, for our sakes, lays down His soul. We also ought to lay down our souls for the sake of the brethren.
17 Now whoever may be having a livelihood in this world, and may be beholding his brother having need, and should be locking his compassions from him -- how is the love of God remaining in him?
18 Little children, we should not be loving in word, neither in tongue, but in act and truth.
19 And in this shall we be knowing that we are of the truth and shall be persuading our hearts in front of Him,
20 seeing that, if our heart should be censuring us, God is greater than our heart, and He knows all.
21 Beloved, if our heart should not be censuring us, we have boldness toward God,
22 and whatsoever we may be requesting, we are obtaining from Him, for we are keeping His precepts and are doing what is pleasing in His sight.
23 And this is His precept, that we should be believing in the name of His Son, Jesus Christ, and may be loving one another according as He gives us a precept.
24 And he who is keeping His precepts is remaining in Him, and He in him. And in this we know that He is remaining in us, by the spirit which He gives us.
Niv
11This is the message you heard from the beginning: We should love one another. 12Do not be like Cain, who belonged to the evil one and murdered his brother. And why did he murder him? Because his own actions were evil and his brother's were righteous. 13Do not be surprised, my brothers, if the world hates you. 14We know that we have passed from death to life, because we love our brothers. Anyone who does not love remains in death. 15Anyone who hates his brother is a murderer, and you know that no murderer has eternal life in him.
16This is how we know what love is: Jesus Christ laid down his life for us. And we ought to lay down our lives for our brothers. 17If anyone has material possessions and sees his brother in need but has no pity on him, how can the love of God be in him? 18Dear children, let us not love with words or tongue but with actions and in truth. 19This then is how we know that we belong to the truth, and how we set our hearts at rest in his presence 20whenever our hearts condemn us. For God is greater than our hearts, and he knows everything.
21Dear friends, if our hearts do not condemn us, we have confidence before God 22and receive from him anything we ask, because we obey his commands and do what pleases him. 23And this is his command: to believe in the name of his Son, Jesus Christ, and to love one another as he commanded us. 24Those who obey his commands live in him, and he in them. And this is how we know that he lives in us: We know it by the Spirit he gave us.